This study examined the relationship between teachers’ attrition and students' mobility from the public to privately owned secondary academies in Delta State between 2015 and 2019 with a view to understanding how teacher attrition influences students’ mobility to non-state secondary academies. Three research questions were posed and one hypothesis was formulated to guide the study. The population of the study consists of 11887 public secondary school teachers and 939 private secondary schools. Using the Cochran’s formula for sample size determination, 373 teachers, 91 private secondary schools, and 782 students who moved schools were sampled randomly for the study. The instrument for the investigation was validated and a reliability value of 0.73 for teachers and 0.77 was found for students. Data shows that a remarkable number of students leave the system annually, and analyses with Pearson’s product-moment Coefficient at 0.05 confidence level indicate that teachers’ transfer is not remarkably linked to students’ mobility; instead the need to pass examinations is. The study recommends: annual recruitment of teachers based on needs, equitable distribution of teachers in ways that ensure no school is disadvantaged; and very tight examination invigilation and supervision to discourage mobility from public secondary schools.